JPWO2010067686A1

JPWO2010067686A1 - Wireless communication system, wireless base station, mobile terminal, wireless communication method, program

Info

Publication number: JPWO2010067686A1
Application number: JP2010542065A
Authority: JP
Inventors: 孝浩筒井
Original assignee: NEC Corp
Current assignee: NEC Corp
Priority date: 2008-12-10
Filing date: 2009-11-11
Publication date: 2012-05-17
Anticipated expiration: 2029-11-11
Also published as: KR101261168B1; KR20110099726A; JP5099234B2; EP2357872A1; CN102246583A; CN102246583B; EP2357872A4; US8639269B2; WO2010067686A1; US20110217993A1

Abstract

本発明の無線通信システムは、移動端末と、前記移動端末に対し、前記移動端末と自局との呼を確立するために用いる報知情報を送信する無線基地局と、を有する。ここで、前記移動端末は、所定の報知情報の識別情報を前記無線基地局に送信する。また、前記無線基地局は、前記移動端末から送信されてきた識別情報と現在送信中の報知情報の識別情報とを比較し、比較の結果に基づいて、現在送信中の報知情報を取得するための情報を前記移動端末に送信する。The radio communication system of the present invention includes a mobile terminal and a radio base station that transmits broadcast information used to establish a call between the mobile terminal and the mobile station to the mobile terminal. Here, the mobile terminal transmits identification information of predetermined broadcast information to the radio base station. Further, the radio base station compares the identification information transmitted from the mobile terminal with the identification information of the currently transmitted broadcast information, and acquires broadcast information currently being transmitted based on the comparison result Is transmitted to the mobile terminal.

Description

本発明は、無線通信システム、無線基地局、移動端末、無線通信方法、プログラムに関する。 The present invention relates to a radio communication system, a radio base station, a mobile terminal, a radio communication method, and a program.

現在、３ＧＰＰ（3rd Generation Partnership Projects）において、ＵＴＲＡＮ（Universal Terrestrial Radio Access Network）が標準化されている。 Currently, UTRAN (Universal Terrestrial Radio Access Network) is standardized in 3GPP (3rd Generation Partnership Projects).

図１に、ＵＴＲＡＮを適用した無線通信システムのアーキテクチャの一例を示す。 FIG. 1 shows an example of the architecture of a wireless communication system to which UTRAN is applied.

図１に示すように、ＵＴＲＡＮ６０は、コアネットワーク（Core Network）５０と接続され、また、複数のＲＮＳ（Radio Network Subsystem）７０によって構成されている。 As shown in FIG. 1, the UTRAN 60 is connected to a core network (Core Network) 50 and includes a plurality of RNS (Radio Network Subsystem) 70.

また、ＲＮＳ７０のそれぞれは、ＲＮＣ（Radio Network Controller）８０と、無線基地局である複数のＮｏｄｅＢ９０と、から構成されている。ＮｏｄｅＢ９０は、移動端末であるＵＥ（User Equipment）１０と無線通信を行う。 Each RNS 70 includes an RNC (Radio Network Controller) 80 and a plurality of NodeBs 90 that are radio base stations. The NodeB 90 performs radio communication with a UE (User Equipment) 10 that is a mobile terminal.

また、最近の３ＧＰＰの標準化においては、ＵＴＲＡＮが無線ＬＡＮ（Local Area Network）などの他の無線通信技術の発展に対して競争力を保つことを目的として、ＵＴＲＡＮＬＴＥ（Long Term Evolution）の検討が行われている（非特許文献１）。 Also, in the recent 3GPP standardization, UTRAN LTE (Long Term Evolution) has been studied for the purpose of keeping UTRAN competitive against the development of other wireless communication technologies such as wireless LAN (Local Area Network). (Non-Patent Document 1).

図２に、ＵＴＲＡＮＬＴＥを適用した無線通信システムのアーキテクチャの一例を示す。 FIG. 2 shows an example of the architecture of a wireless communication system to which UTRAN LTE is applied.

図２に示すように、ＵＴＲＡＮＬＴＥでは、ＲＮＣとＮｏｄｅＢとが一体化されて実現された無線基地局である複数のｅＮＢ２０によってＵＴＲＡＮが構成されている。 As shown in FIG. 2, in UTRAN LTE, UTRAN is configured by a plurality of eNBs 20 which are radio base stations realized by integrating RNC and NodeB.

ＵＴＲＡＮＬＴＥでは、ＵＴＲＡＮは、Ｅ−ＵＴＲＡＮ（Evolution-UTRAN）３０と定義され、また、コアネットワークと制御機能部は、ＭＭＥ（Mobility Management Entity）４０と定義されている。 In UTRAN LTE, UTRAN is defined as E-UTRAN (Evolution-UTRAN) 30, and the core network and control function unit are defined as MME (Mobility Management Entity) 40.

また、ＵＴＲＡＮＬＴＥでは、ｅＮＢ２０とＭＭＥ４０間のインターフェースはＳ１、ｅＮＢ２０間のインターフェースはＸ２、ｅＮＢ２０とＵＥ１０間のインターフェースはＵｕとそれぞれ定義されている。 In UTRAN LTE, the interface between the eNB 20 and the MME 40 is defined as S1, the interface between the eNB 20 is defined as X2, and the interface between the eNB 20 and the UE 10 is defined as Uu.

上述のように、ＵＴＲＡＮＬＴＥでは、ＲＮＣとＮｏｄｅＢとを一体化することにより、図１のＵＴＲＡＮ６０と比較して、Ｅ−ＵＴＲＡＮ３０のノード数が削減される。 As described above, in the UTRAN LTE, the number of nodes of the E-UTRAN 30 is reduced by integrating the RNC and the Node B as compared with the UTRAN 60 in FIG.

また、ＵＴＲＡＮＬＴＥでは、ノード数が削減されるため、ＵＥ１０が通信を行うためのＵＥ１０／ｅＮＢ２０／ＭＭＥ４０間のコネクションの設定遅延が低減される（非特許文献２）。これは、図１のＵＴＲＡＮ６０でのＲＮＣ８０／ＮｏｄｅＢ９０間のコネクションの設定が、図２のＥ−ＵＴＲＡＮ３０では不要になるからである。 Moreover, in UTRAN LTE, since the number of nodes is reduced, the setting delay of the connection between UE10 / eNB20 / MME40 for UE10 to communicate is reduced (nonpatent literature 2). This is because the setting of the connection between the RNC 80 and the NodeB 90 in the UTRAN 60 in FIG. 1 is not required in the E-UTRAN 30 in FIG.

ところで、ＵＥ１０は、ｅＮＢ２０と呼を確立するためには、ｅＮＢ２０からブロードキャストで配信される報知情報を受信することが必要となる。報知情報とは、ＵＥ１０が呼を確立するために最低限必要となる設定情報であり、例えば、ＵＥ１０からｅＮＢ２０への送信信号の送信電力を示すパラメータ、ＵＥ１０からｅＮＢ２０へのアクセスの規制に関する規制情報を示すパラメータ等が含まれる。 By the way, in order to establish a call with eNB20, UE10 needs to receive the alerting | reporting information delivered by broadcast from eNB20. The broadcast information is setting information necessary for the UE 10 to establish a call, for example, a parameter indicating the transmission power of a transmission signal from the UE 10 to the eNB 20, and regulation information related to restrictions on access from the UE 10 to the eNB 20 The parameter etc. which are shown are included.

例えば、ＵＥ１０は、ＵＥ１０の起動・セルの再選択・ハンドオーバの完了・カバレージからの復帰・報知情報の変更の際に、報知情報を受信する（非特許文献３）。 For example, the UE 10 receives broadcast information at the time of UE 10 activation, cell reselection, handover completion, return from coverage, and change of broadcast information (Non-Patent Document 3).

図３に、ＵＴＲＡＮＬＴＥにおける報知情報受信シーケンスの一例を示す。 FIG. 3 shows an example of a broadcast information reception sequence in UTRAN LTE.

図３に示すように、ｅＮＢ２０は、報知情報を変更する際、ステップＥ１１において、報知情報を変更することを通知する情報をページング信号に付与し、そのページング信号のＲＲＣ（Radio Resource Control）メッセージをＵＥ１０に送信する。 As illustrated in FIG. 3, when the eNB 20 changes the broadcast information, in step E11, the eNB 20 adds information notifying that the broadcast information is changed to the paging signal, and sends an RRC (Radio Resource Control) message of the paging signal. Transmit to UE10.

ＵＥ１０は、ｅＮＢ２０から、報知情報の変更を通知する情報が付与されたページング信号のＲＲＣメッセージの受信後に、ステップＥ１２〜Ｅ１４において、変更された報知情報のＲＲＣメッセージを受信する。 After receiving the RRC message of the paging signal to which information for notifying the notification information change is received from the eNB 20, the UE 10 receives the RRC message of the changed notification information in steps E <b> 12 to E <b> 14.

報知情報は、ＭＩＢ（Master Information Block）、ＳＩＢｔｙｐｅ１（System Information Block Type1）、およびＳＩ（System Information）から構成される。なお、上述のパラメータは、ＳＩＢｔｙｐｅ１またはＳＩに付与される。 The broadcast information is composed of MIB (Master Information Block), SIBtype 1 (System Information Block Type 1), and SI (System Information). The above parameters are given to SIBtype1 or SI.

報知情報が変更された際、ＵＥ１０は、ＭＩＢおよびＳＩＢｔｙｐｅ１を受信し、また、ＳＩＢｔｙｐｅ１のＳｙｓｔｅｍＩｎｆｏｒｍａｔｉｏｎＶａｌｕｅＴａｇ（以下、ＶａｌｕｅＴａｇと称す）が変更前の報知情報のＶａｌｕｅＴａｇの値と異なる時のみＳＩを受信する。ＶａｌｕｅＴａｇとは、報知情報を識別する識別情報であり、例えば、報知情報のバージョン番号等である。 When the broadcast information is changed, the UE 10 receives the MIB and SIBtype1, and receives SI only when the System Information Value Tag (hereinafter referred to as ValueTag) of the SIBtype1 is different from the value of the value tag of the broadcast information before the change. To do. ValueTag is identification information that identifies broadcast information, and is, for example, a version number of broadcast information.

ＵＥ１０は、上記のように受信した報知情報を基に、ｅＮＢ２０と呼確立処理、すなわちＲＲＣＣｏｎｎｅｃｔｉｏｎ確立処理を行う。 The UE 10 performs call establishment processing with the eNB 20, that is, RRC Connection establishment processing, based on the broadcast information received as described above.

図４に、ＵＴＲＡＮＬＴＥにおけるＲＲＣＣｏｎｎｅｃｔｉｏｎ確立シーケンスの一例を示す。 FIG. 4 shows an example of an RRC connection establishment sequence in UTRAN LTE.

図４に示すように、まず、ＵＥ１０は、ステップＦ１１において、ＲＡＣＨ（Random Access Channel）ＰｒｅａｍｂｌｅメッセージをｅＮＢ２０に送信し、ステップＦ１２において、ｅＮＢ２０からＲＡＣＨＲｅｓｐｏｎｓｅメッセージを受信する。このＲＡＣＨ手順により、ＵＥ１０は、ＲＲＣメッセージを送信するためのＩＤを取得する。 As illustrated in FIG. 4, first, the UE 10 transmits a RACH (Random Access Channel) preamble message to the eNB 20 in Step F11, and receives a RACH Response message from the eNB 20 in Step F12. Through this RACH procedure, the UE 10 acquires an ID for transmitting the RRC message.

次に、ＵＥ１０は、ステップＦ１３において、ｅＮＢ２０に対し、呼確立を要求するＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｑｕｅｓｔメッセージを送信する。 Next, UE10 transmits the RRC Connection Request message which requests | requires call establishment with respect to eNB20 in step F13.

ｅＮＢ２０は、呼確立をする場合、ステップＦ１４において、ＵＥ１０に対し、呼確立をするＲＲＣＣｏｎｎｅｃｔｉｏｎＳｅｔｕｐメッセージを送信する。 When establishing a call, the eNB 20 transmits an RRC Connection Setup message for establishing a call to the UE 10 in Step F14.

その後、ＵＥ１０は、呼確立が完了すると、ステップＦ１５において、ｅＮＢ２０に対し、呼確立が完了したことを通知するＲＲＣＣｏｎｎｅｃｔｉｏｎＳｅｔｕｐＣｏｍｐｌｅｔｅメッセージを送信する。 Thereafter, when the call establishment is completed, the UE 10 transmits an RRC Connection Setup Complete message that notifies the eNB 20 that the call establishment is completed in Step F15.

E-UTRA and E-UTRAN; Overall description [3GPP TS 36.300 V8.6.0 (2008-9)]E-UTRA and E-UTRAN; Overall description [3GPP TS 36.300 V8.6.0 (2008-9)] UTRAN overall description [3GPP TS 25.401 V8.1.0 (2008-09)]UTRAN overall description [3GPP TS 25.401 V8.1.0 (2008-09)] E-UTRA RRC Protocol specification [3GPP TS 36.331 V8.3.0 (2008-9)]E-UTRA RRC Protocol specification [3GPP TS 36.331 V8.3.0 (2008-9)]

しかし、ＵＥ１０は、電波の受信品質が悪い場合、報知情報の変更を通知する情報が付与されたページング信号を受信できない、または、報知情報の変更に関する誤った情報を受信するおそれがある。 However, when the radio wave reception quality is poor, the UE 10 may not be able to receive a paging signal to which information for notifying the change of the broadcast information is added, or may receive erroneous information regarding the change of the broadcast information.

この場合、ＵＥ１０は、報知情報が変更されたことに気づかず、現在送信中の報知情報を取得することができないという課題がある。 In this case, there is a problem that the UE 10 does not notice that the broadcast information has been changed and cannot acquire the broadcast information currently being transmitted.

そこで、本発明の目的は、上述した課題を解決し、移動端末が現在送信中の報知情報を取得することができる無線通信システム、無線基地局、移動端末、無線通信方法、プログラムを提供することにある。 Accordingly, an object of the present invention is to provide a radio communication system, a radio base station, a mobile terminal, a radio communication method, and a program that can solve the above-described problems and can acquire broadcast information that is currently being transmitted by the mobile terminal. It is in.

本発明の無線通信システムは、
移動端末と、前記移動端末に対し、前記移動端末と自局との呼を確立するために用いる報知情報を無線上に送信する無線基地局と、を有してなる無線通信システムであって、
前記移動端末は、
所定の報知情報の識別情報を前記無線基地局に送信し、
前記無線基地局は、
前記移動端末から送信されてきた識別情報と現在送信中の報知情報の識別情報とを比較し、比較の結果に基づいて、現在送信中の報知情報を取得するための情報を前記移動端末に送信する。The wireless communication system of the present invention includes:
A wireless communication system comprising: a mobile terminal; and a wireless base station that wirelessly transmits broadcast information used to establish a call between the mobile terminal and the mobile station to the mobile terminal,
The mobile terminal
Transmitting identification information of predetermined broadcast information to the radio base station;
The radio base station is
The identification information transmitted from the mobile terminal is compared with the identification information of broadcast information currently being transmitted, and information for acquiring broadcast information currently being transmitted is transmitted to the mobile terminal based on the comparison result. To do.

本発明の無線基地局は、
移動端末に対し、前記移動端末と自局との呼を確立するために用いる報知情報を送信する無線基地局であって、
前記移動端末から、所定の報知情報を識別する識別情報を受信する受信部と、
前記移動端末から受信した識別情報と現在送信中の報知情報の識別情報とを比較する制御部と、
報知情報を前記移動端末に送信するとともに、前記比較の結果に基づいて、現在送信中の報知情報を取得するための情報を前記移動端末に送信する送信部と、を有する。The radio base station of the present invention is
A radio base station that transmits broadcast information used to establish a call between the mobile terminal and the mobile station to the mobile terminal,
A receiving unit that receives identification information for identifying predetermined broadcast information from the mobile terminal;
A control unit that compares the identification information received from the mobile terminal with the identification information of the broadcast information currently being transmitted;
A transmitter that transmits the broadcast information to the mobile terminal and transmits information for acquiring broadcast information currently being transmitted to the mobile terminal based on the comparison result.

本発明の移動端末は、
無線基地局から、前記無線基地局と自端末との呼を確立するために用いる報知情報を受信する移動端末であって、
所定の報知情報を識別する識別情報を前記無線基地局に送信する送信部と、
前記無線基地局から報知情報を受信するとともに、前記無線基地局に送信した識別情報が現在送信中の報知情報の識別情報と一致しない場合に、前記無線基地局から、現在送信中の報知情報を取得するための情報を受信する受信部と、を有する。The mobile terminal of the present invention
A mobile terminal that receives broadcast information used to establish a call between the radio base station and the own terminal from a radio base station,
A transmission unit for transmitting identification information for identifying predetermined broadcast information to the radio base station;
When the broadcast information is received from the radio base station and the identification information transmitted to the radio base station does not match the identification information of the broadcast information currently being transmitted, the broadcast information currently being transmitted is sent from the radio base station. And a receiving unit that receives information for acquisition.

本発明の第１の無線通信方法は、
移動端末と、前記移動端末に対し、前記移動端末と自局との呼を確立するために用いる報知情報を送信する無線基地局と、を有してなる無線通信システムによる無線通信方法であって、
前記移動端末が、所定の報知情報を識別する識別情報を前記無線基地局に送信するステップと、
前記無線基地局が、前記移動端末から送信されてきた識別情報と現在送信中の報知情報の識別情報とを比較するステップと、
前記無線基地局が、前記比較の結果に基づいて、現在送信中の報知情報を取得するための情報を前記移動端末に送信するステップと、を有する。The first wireless communication method of the present invention includes:
A radio communication method using a radio communication system comprising: a mobile terminal; and a radio base station that transmits broadcast information used for establishing a call between the mobile terminal and the mobile station to the mobile terminal. ,
The mobile terminal transmitting identification information for identifying predetermined broadcast information to the radio base station;
The radio base station comparing the identification information transmitted from the mobile terminal with the identification information of the broadcast information currently being transmitted;
The radio base station transmitting to the mobile terminal information for acquiring broadcast information currently being transmitted based on the comparison result.

本発明の第２の無線通信方法は、
移動端末に対し、前記移動端末と自局との呼を確立するために用いる報知情報を送信する無線基地局による無線通信方法であって、
前記移動端末から、所定の報知情報を識別する識別情報を受信するステップと、
前記移動端末から受信した識別情報と現在送信中の報知情報の識別情報とを比較するステップと、
前記比較の結果に基づいて、現在送信中の報知情報を取得するための情報を前記移動端末に送信するステップと、を有する。The second wireless communication method of the present invention includes:
A radio communication method by a radio base station that transmits broadcast information used for establishing a call between the mobile terminal and the mobile station to a mobile terminal,
Receiving identification information for identifying predetermined broadcast information from the mobile terminal;
Comparing the identification information received from the mobile terminal with the identification information of the broadcast information currently being transmitted;
Transmitting to the mobile terminal information for acquiring broadcast information currently being transmitted based on the result of the comparison.

本発明の第３の無線通信方法は、
無線基地局から、前記無線基地局と自端末との呼を確立するために用いる報知情報を受信する移動端末による無線通信方法であって、
所定の報知情報を識別する識別情報を前記無線基地局に送信するステップと、
前記無線基地局に送信した識別情報が現在送信中の報知情報の識別情報と一致しない場合に、前記無線基地局から、現在送信中の報知情報を取得するための情報を受信するステップと、を有する。The third wireless communication method of the present invention is:
A radio communication method by a mobile terminal that receives broadcast information used to establish a call between the radio base station and the terminal from the radio base station,
Transmitting identification information for identifying predetermined broadcast information to the radio base station;
Receiving the information for acquiring broadcast information currently being transmitted from the radio base station when the identification information transmitted to the radio base station does not match the identification information of the broadcast information currently being transmitted; Have.

本発明の第１のプログラムは、
移動端末に対し、前記移動端末と自局との呼を確立するために用いる報知情報を送信する無線基地局に、
前記移動端末から、所定の報知情報を識別する識別情報を受信する手順と、
前記移動端末から受信した識別情報と現在送信中の報知情報の識別情報とを比較する手順と、
前記比較の結果に基づいて、現在送信中の報知情報を取得するための情報を前記移動端末に送信する手順と、を実行させる。The first program of the present invention is:
A radio base station that transmits broadcast information used to establish a call between the mobile terminal and the mobile station to the mobile terminal,
Receiving identification information for identifying predetermined broadcast information from the mobile terminal;
A procedure for comparing the identification information received from the mobile terminal with the identification information of the broadcast information currently being transmitted;
Based on the comparison result, a procedure for transmitting information for acquiring broadcast information currently being transmitted to the mobile terminal is executed.

本発明の第２のプログラムは、
無線基地局から、前記無線基地局と自端末との呼を確立するために用いる報知情報を受信する移動端末に、
所定の報知情報を識別する識別情報を前記無線基地局に送信する手順と、
前記無線基地局に送信した識別情報が現在送信中の報知情報の識別情報と一致しない場合に、前記無線基地局から、現在送信中の報知情報を取得するための情報を受信する手順と、を実行させる。The second program of the present invention is:
From a radio base station to a mobile terminal that receives broadcast information used to establish a call between the radio base station and the own terminal,
A procedure for transmitting identification information for identifying predetermined broadcast information to the radio base station;
When the identification information transmitted to the radio base station does not match the identification information of the currently transmitted broadcast information, a procedure for receiving information for acquiring the broadcast information currently transmitted from the radio base station. Let it run.

本発明によれば、移動端末は、所定の報知情報の識別情報を無線基地局に送信し、無線基地局は、移動端末から送信されてきた識別情報と現在送信中の報知情報の識別情報とを比較し、比較結果に基づいて、現在送信中の報知情報を取得するための情報を移動端末に送信する。 According to the present invention, the mobile terminal transmits identification information of predetermined broadcast information to the radio base station, and the radio base station transmits the identification information transmitted from the mobile terminal and the identification information of the broadcast information currently being transmitted. And, based on the comparison result, transmits information for acquiring broadcast information currently being transmitted to the mobile terminal.

よって、移動端末は、無線基地局から送信されてきた情報を基に、現在送信中の報知情報を取得できるようになるという効果が得られる。 Therefore, the mobile terminal can obtain the broadcast information that is currently being transmitted based on the information transmitted from the radio base station.

ＵＴＲＡＮを適用した無線通信システムのアーキテクチャの一例を示す図である。It is a figure which shows an example of the architecture of the radio | wireless communications system to which UTRAN is applied. ＵＴＲＡＮＬＴＥを適用した無線通信システムのアーキテクチャの一例を示す図である。It is a figure which shows an example of the architecture of the radio | wireless communications system to which UTRAN LTE is applied. ＵＴＲＡＮＬＴＥにおける報知情報受信シーケンスの一例を説明するシーケンスチャートである。It is a sequence chart explaining an example of the alerting | reporting information reception sequence in UTRAN LTE. ＵＴＲＡＮＬＴＥにおけるＲＲＣＣｏｎｎｅｃｔｉｏｎ確立シーケンスの一例を説明するシーケンスチャートである。It is a sequence chart explaining an example of the RRC Connection establishment sequence in UTRAN LTE. 本実施形態のＵＥの構成の一例を示すブロック図である。It is a block diagram which shows an example of a structure of UE of this embodiment. 本実施形態のｅＮＢの構成の一例を示すブロック図である。It is a block diagram which shows an example of a structure of eNB of this embodiment. 本実施形態の報知情報の変更履歴テーブルの一例を説明する図である。It is a figure explaining an example of the change history table of the information information of this embodiment. 本実施形態の無線通信システムにおけるＲＲＣＣｏｎｎｅｃｔｉｏｎ確立シーケンスの第１の例を説明するシーケンスチャートである。It is a sequence chart explaining the 1st example of the RRC Connection establishment sequence in the radio | wireless communications system of this embodiment. 本実施形態の無線通信システムにおけるＲＲＣＣｏｎｎｅｃｔｉｏｎ確立シーケンスの第２の例を説明するシーケンスチャートである。It is a sequence chart explaining the 2nd example of the RRC Connection establishment sequence in the radio | wireless communications system of this embodiment. 本実施形態の無線通信システムにおけるＲＲＣＣｏｎｎｅｃｔｉｏｎ確立シーケンスの第３の例を説明するシーケンスチャートである。It is a sequence chart explaining the 3rd example of the RRC Connection establishment sequence in the radio communications system of this embodiment. 本実施形態の無線通信システムにおけるＲＲＣＣｏｎｎｅｃｔｉｏｎ確立シーケンスの第４の例を説明するシーケンスチャートである。It is a sequence chart explaining the 4th example of the RRC Connection establishment sequence in the radio communications system of this embodiment. 図８〜図１１において、ＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｑｕｅｓｔメッセージの受信時のｅＮＢの処理のシーケンス全体を説明するシーケンスチャートである。8 to 11 are sequence charts illustrating the entire sequence of processing of the eNB at the time of receiving the RRC Connection Request message.

以下に、本発明を実施するための最良の形態について図面を参照して説明する。 The best mode for carrying out the present invention will be described below with reference to the drawings.

なお、以下で説明する実施形態において、無線通信システムの全体構成自体は、図２のＵＴＲＡＮＬＴＥを適用した無線通信システムと同様であるとする。 In the embodiment described below, the overall configuration of the radio communication system itself is assumed to be the same as that of the radio communication system to which UTRAN LTE of FIG. 2 is applied.

図５および図６を参照すると、本実施形態のＵＥ１０およびｅＮＢ２０の各ノードの構成の詳細が示されている。 Referring to FIGS. 5 and 6, details of the configuration of each node of the UE 10 and the eNB 20 of the present embodiment are shown.

図５に示すように、本実施形態のＵＥ１０は、ＲＲＣレイヤー１１と、伝送部（Ｕｕ）１２と、制御部１３と、を有している。 As illustrated in FIG. 5, the UE 10 according to the present embodiment includes an RRC layer 11, a transmission unit (Uu) 12, and a control unit 13.

ＲＲＣレイヤー１１は、ＲＲＣメッセージの解読処理とＲＲＣメッセージの生成処理とを実施する処理部である。 The RRC layer 11 is a processing unit that performs RRC message decryption processing and RRC message generation processing.

伝送部（Ｕｕ）１２は、Ｕｕインターフェースへメッセージを送信する送信部（Ｕｕ）１２Ａと、Ｕｕインターフェースからメッセージや報知情報を受信する受信部（Ｕｕ）１２Ｂと、を持つ。 The transmission unit (Uu) 12 includes a transmission unit (Uu) 12A that transmits a message to the Uu interface, and a reception unit (Uu) 12B that receives a message and broadcast information from the Uu interface.

制御部１３は、ＲＲＣレイヤー１１にＲＲＣメッセージの生成を指示する。また、制御部１３は、ＲＲＣレイヤー１１からのＲＲＣメッセージの解読結果を基に必要な処理を実施する。 The control unit 13 instructs the RRC layer 11 to generate an RRC message. In addition, the control unit 13 performs necessary processing based on the result of decoding the RRC message from the RRC layer 11.

具体的には、ＲＲＣレイヤー１１は、ＵＥ１０内で保持している報知情報等の所定の報知情報のＶａｌｕｅＴａｇを設定したＲＲＣメッセージを生成し、送信部（Ｕｕ）１２Ａは、そのＲＲＣメッセージをＵｕインターフェース経由でｅＮＢ２０に送信する。 Specifically, the RRC layer 11 generates an RRC message in which a ValueTag of predetermined broadcast information such as broadcast information held in the UE 10 is set, and the transmission unit (Uu) 12A transmits the RRC message to the Uu interface. It transmits to eNB20 via.

また、制御部１３は、ｅＮＢ２０に送信した報知情報のＶａｌｕｅＴａｇが、無線上に現在送信中の報知情報のＶａｌｕｅＴａｇと一致しない場合、ｅＮＢ２０から、現在送信中の報知情報を取得するための情報が設定されたＲＲＣメッセージが送信されてくるため、その情報を基に現在送信中の報知情報を取得する。 In addition, when the ValueTag of the broadcast information transmitted to the eNB 20 does not match the ValueTag of the broadcast information currently transmitted on the radio, the control unit 13 sets information for acquiring the broadcast information currently being transmitted from the eNB 20 Since the received RRC message is transmitted, the broadcast information currently being transmitted is acquired based on the information.

なお、現在送信中の報知情報を取得するための情報とは、以下の（１）または（２）のいずれかであるが、詳細は後述する。 Note that the information for acquiring broadcast information currently being transmitted is either (1) or (2) below, and details will be described later.

（１）報知情報の再取得を要求する情報
（２）ＵＥ１０内で保持されている報知情報と現在送信中の報知情報との差分の情報および現在送信中の報知情報のＶａｌｕｅＴａｇ
また、図６に示すように、本実施形態のｅＮＢ２０は、ＲＲＣレイヤー２１と、伝送部（Ｕｕ）２２と、制御部２３と、を有している。(1) Information requesting re-acquisition of broadcast information (2) Information on difference between broadcast information held in UE 10 and broadcast information currently being transmitted, and ValueTag of broadcast information currently being transmitted
Also, as illustrated in FIG. 6, the eNB 20 of the present embodiment includes an RRC layer 21, a transmission unit (Uu) 22, and a control unit 23.

ＲＲＣレイヤー２１は、ＲＲＣメッセージの解読処理とＲＲＣメッセージの生成処理とを実施する処理部である。 The RRC layer 21 is a processing unit that performs RRC message decryption processing and RRC message generation processing.

伝送部（Ｕｕ）２２は、Ｕｕインターフェースへメッセージや報知情報を送信する送信部（Ｕｕ）２２Ａと、Ｕｕインターフェースからメッセージを受信する受信部（Ｕｕ）２２Ｂと、を持つ。 The transmission unit (Uu) 22 includes a transmission unit (Uu) 22A that transmits a message and broadcast information to the Uu interface, and a reception unit (Uu) 22B that receives a message from the Uu interface.

制御部２３は、ＲＲＣレイヤー２１にＲＲＣメッセージの生成を指示する。また、制御部２３は、ＲＲＣレイヤー２１からのＲＲＣメッセージの解読結果を基に必要な処理を実施する。 The control unit 23 instructs the RRC layer 21 to generate an RRC message. In addition, the control unit 23 performs necessary processing based on the result of decoding the RRC message from the RRC layer 21.

具体的には、制御部２３は、ＵＥ１０から送信されてきたＶａｌｕｅＴａｇが、無線上に現在送信中の報知情報のＶａｌｕｅＴａｇと一致するか比較する。 Specifically, the control unit 23 compares whether the ValueTag transmitted from the UE 10 matches the ValueTag of the broadcast information currently being transmitted on the radio.

また、ＲＲＣレイヤー２１は、ＵＥ１０から送信されてきたＶａｌｕｅＴａｇが現在送信中の報知情報のＶａｌｕｅＴａｇと一致しない場合、現在送信中の報知情報を取得するための情報を設定したＲＲＣメッセージを生成し、送信部（Ｕｕ）２２Ａは、そのＲＲＣメッセージをＵｕインターフェース経由でＵＥ１０に送信する。 In addition, when the ValueTag transmitted from the UE 10 does not match the ValueTag of the currently transmitted notification information, the RRC layer 21 generates an RRC message in which information for acquiring the currently transmitted notification information is set and transmitted. The unit (Uu) 22A transmits the RRC message to the UE 10 via the Uu interface.

その他にも、制御部２３は、以前に無線上に送信していた過去の報知情報の変更履歴を、図７に示すように、報知情報変更履歴テーブルに設定し保存する処理を実施する。 In addition, as shown in FIG. 7, the control unit 23 performs a process of setting and saving a past change history of the previous broadcast information that has been transmitted wirelessly in the broadcast information change history table.

図７に示す報知情報変更履歴テーブルには、以前に無線上に送信していた過去の報知情報のＶａｌｕｅＴａｇの値と、そのＶａｌｕｅＴａｇを保持するＵＥ１０との呼確立の実施／未実施を判定する情報と、が対応付けられて設定されている。 In the broadcast information change history table shown in FIG. 7, the value of the value tag of the previous broadcast information previously transmitted on the radio and information for determining whether the call establishment with the UE 10 that holds the value tag is performed or not performed. Are set in association with each other.

呼確立の実施／未実施を設定するに際しては、対応するＶａｌｕｅＴａｇの値で送信していた過去の報知情報と現在送信中の報知情報との差分に規制情報に関連するパラメータが含まれていない場合は呼確立を実施とし、規制情報に関連するパラメータが含まれている場合は呼確立を未実施とする。 When setting execution / non-execution of call establishment, a parameter related to the restriction information is not included in the difference between the previous broadcast information transmitted with the value of the corresponding ValueTag and the broadcast information currently being transmitted. The call establishment is carried out, and the call establishment is not carried out when parameters related to the regulation information are included.

以下、本実施形態の無線通信システムにおけるＲＲＣＣｏｎｎｅｃｔｉｏｎ確立シーケンスについて、４つの例に分けて説明する。 Hereinafter, the RRC Connection establishment sequence in the wireless communication system of the present embodiment will be described in four examples.

（第１の例）
図８に、本例におけるＲＲＣＣｏｎｎｅｃｔｉｏｎ確立シーケンスを示す。(First example)
FIG. 8 shows an RRC connection establishment sequence in this example.

なお、図８（後述する図９〜図１１も同様）において、ＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｑｕｅｓｔメッセージの受信時のｅＮＢ２０の処理のシーケンス全体は、後述する図１２に示すものとする。 In FIG. 8 (the same applies to FIGS. 9 to 11 described later), the entire processing sequence of the eNB 20 at the time of receiving the RRC Connection Request message is illustrated in FIG. 12 described later.

本例は、ＵＥ１０が無線上に現在送信中の報知情報を保持している状態において呼確立を実施する手順とする。 This example is a procedure for performing call establishment in a state where the UE 10 holds the broadcast information currently being transmitted on the radio.

まず、ステップＡ１１，Ａ１２において、ＵＥ１０とｅＮＢ２０との間で、図４のステップＦ１１，Ｆ１２と同様のＲＡＣＨ手順を実施する。 First, in steps A11 and A12, the same RACH procedure as in steps F11 and F12 in FIG. 4 is performed between the UE 10 and the eNB 20.

次に、ＵＥ１０は、ステップＡ１３において、ＲＲＣレイヤー１１により、ＵＥ１０内部で保持しているＶａｌｕｅＴａｇを、呼確立を要求するＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｑｕｅｓｔメッセージへ設定し、送信部（Ｕｕ）１２Ａにより、そのＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｑｕｅｓｔメッセージをｅＮＢ２０へ送信する。 Next, in step A13, the UE 10 sets the value tag held in the UE 10 to the RRC Connection Request message for requesting call establishment by the RRC layer 11, and the transmitting unit (Uu) 12A sets the RRC Connection Request. A message is transmitted to eNB20.

次に、ｅＮＢ２０は、ステップＳ１１において、制御部２３により、ＵＥ１０から通知されたＶａｌｕｅＴａｇと、無線上に現在送信中の報知情報のＶａｌｕｅＴａｇと、を比較する。ここでは、比較結果が一致したため、ｅＮＢ２０は、ステップＡ１４において、送信部（Ｕｕ）２２Ａにより、呼確立をするＲＲＣＣｏｎｎｅｃｔｉｏｎＳｅｔｕｐメッセージをＵＥ１０へ送信する。 Next, in step S11, the eNB 20 compares the ValueTag notified from the UE 10 by the control unit 23 with the ValueTag of the broadcast information currently being transmitted on the radio. Here, since the comparison results match, the eNB 20 transmits an RRC Connection Setup message for establishing a call to the UE 10 by the transmission unit (Uu) 22A in Step A14.

その後、ＵＥ１０は、ステップＡ１５において、送信部（Ｕｕ）１２Ａにより、呼確立が完了したことを通知するＲＲＣＣｏｎｎｅｃｔｉｏｎＳｅｔｕｐＣｏｍｐｌｅｔｅメッセージをｅＮＢ２０に送信する。これにより、呼確立が完了となる。 Thereafter, in step A15, the UE 10 transmits, to the eNB 20, an RRC Connection Setup Complete message notifying that the call establishment is completed by the transmission unit (Uu) 12A. Thereby, call establishment is completed.

（第２の例）
図９に、本例におけるＲＲＣＣｏｎｎｅｃｔｉｏｎ確立シーケンスを示す。(Second example)
FIG. 9 shows an RRC connection establishment sequence in this example.

本例は、ＵＥ１０が、無線上に現在送信中の報知情報を保持していない状態において呼確立を実施する手順とし、かつ、呼確立の実施を中止した後、無線上に現在送信中の報知情報を受信し、再度呼確立を実施する手順とする。 This example is a procedure in which the UE 10 performs call establishment in a state where the broadcast information currently being transmitted is not held on the radio, and the broadcast currently being transmitted on the radio after the call establishment is stopped. The procedure is to receive information and perform call establishment again.

まず、ステップＢ１１，Ｂ１２において、ＵＥ１０とｅＮＢ２０との間で、図４のステップＦ１１，Ｆ１２と同様のＲＡＣＨ手順を実施する。 First, in steps B11 and B12, the same RACH procedure as in steps F11 and F12 of FIG. 4 is performed between the UE 10 and the eNB 20.

次に、ＵＥ１０は、ステップＢ１３において、ＲＲＣレイヤー１１により、ＵＥ１０内部で保持しているＶａｌｕｅＴａｇをＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｑｕｅｓｔメッセージへ設定し、送信部（Ｕｕ）１２Ａにより、そのＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｑｕｅｓｔメッセージをｅＮＢ２０へ送信する。 Next, in Step B13, the UE 10 sets the ValueTag held in the UE 10 to the RRC Connection Request message by the RRC layer 11, and transmits the RRC Connection Request message to the eNB 20 by the transmission unit (Uu) 12A. .

次に、ｅＮＢ２０は、ステップＳ１１において、制御部２３により、ＵＥ１０から通知されたＶａｌｕｅＴａｇと、無線上に現在送信中の報知情報のＶａｌｕｅＴａｇと、を比較する。ここでは、比較結果が一致しなかったため、ステップＳ１２の処理に移る。 Next, in step S11, the eNB 20 compares the ValueTag notified from the UE 10 by the control unit 23 with the ValueTag of the broadcast information currently being transmitted on the radio. Here, since the comparison results do not match, the process proceeds to step S12.

次に、ｅＮＢ２０は、ステップＳ１２において、制御部２３により、ＵＥ１０から通知されたＶａｌｕｅＴａｇと、報知情報変更履歴テーブル（図７参照）に設定されているＶａｌｕｅＴａｇすなわち以前に無線上に送信されていた過去の報知情報のＶａｌｕｅＴａｇと、を比較する。ここでは、比較結果が一致しなかったため、ステップＳ１３の処理に移る。 Next, in step S12, the eNB 20 uses the value tag notified from the UE 10 by the control unit 23 and the value tag set in the broadcast information change history table (see FIG. 7), that is, the past that was previously transmitted on the radio. Is compared with the value tag of the notification information. Here, since the comparison results do not match, the process proceeds to step S13.

次に、ｅＮＢ２０は、ステップＳ１３において、ＲＲＣレイヤー２１により、呼確立を拒否するＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｊｅｃｔメッセージに、報知情報の再取得を要求する情報を設定し、ステップＢ１４において、送信部（Ｕｕ）２２Ａにより、そのＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｊｅｃｔメッセージをＵＥ１０へ送信する。 Next, eNB20 sets the information which requests | requires reacquisition of alerting | reporting information to the RRC Connection Reject message which refuses call establishment by RRC layer 21 in step S13, and transmission part (Uu) 22A in step B14 The RRC Connection Reject message is transmitted to the UE 10.

次に、ＵＥ１０は、ステップＢ１５において、受信部（Ｕｕ）１２Ｂにより、図３の報知情報のＲＲＣメッセージだけを受信する処理を実施する。 Next, UE10 performs the process which receives only the RRC message of the alerting | reporting information of FIG. 3 by receiving part (Uu) 12B in step B15.

その後、ＵＥ１０は、ステップＢ１６において、制御部１３により、ＵＥ１０内部のＶａｌｕｅＴａｇの値を更新した上で、図８全体の処理を実施し、呼を確立する。 Thereafter, in step B16, the UE 10 updates the value of the ValueTag inside the UE 10 by the control unit 13, and then performs the entire process of FIG. 8 to establish a call.

（第３の例）
図１０に、本例におけるＲＲＣＣｏｎｎｅｃｔｉｏｎ確立シーケンスを示す。(Third example)
FIG. 10 shows an RRC connection establishment sequence in this example.

本例は、ＵＥ１０が、無線上に現在送信中の報知情報を保持していない状態において呼確立を実施する手順とし、かつ、呼確立の実施を中止せずに、ＵＥ１０が現在保持している報知情報を無線上に現在送信中の報知情報へ更新し、呼確立を継続して実施する手順とする。 In this example, the UE 10 has a procedure for performing call establishment in a state where the broadcast information currently being transmitted on the radio is not retained, and the UE 10 currently retains the call establishment without stopping. The broadcast information is updated to the broadcast information that is currently being transmitted over the radio, and the call establishment is continued.

まず、ステップＣ１１，Ｃ１２において、ＵＥ１０とｅＮＢ２０との間で、図４のステップＦ１１，Ｆ１２と同様のＲＡＣＨ手順を実施する。 First, in steps C11 and C12, a RACH procedure similar to steps F11 and F12 in FIG. 4 is performed between the UE 10 and the eNB 20.

次に、ＵＥ１０は、ステップＣ１３において、ＲＲＣレイヤー１１により、ＵＥ１０内部で保持しているＶａｌｕｅＴａｇをＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｑｕｅｓｔメッセージへ設定し、送信部（Ｕｕ）１２Ａにより、そのＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｑｕｅｓｔメッセージをｅＮＢ２０へ送信する。 Next, in Step C13, the UE 10 sets the ValueTag held in the UE 10 to the RRC Connection Request message by the RRC layer 11, and transmits the RRC Connection Request message to the eNB 20 by the transmission unit (Uu) 12A. .

次に、ｅＮＢ２０は、ステップＳ１２において、制御部２３により、ＵＥ１０から通知されたＶａｌｕｅＴａｇと、報知情報変更履歴テーブル（図７参照）に設定されているＶａｌｕｅＴａｇと、を比較する。ここでは、比較結果が一致したため、ステップＳ１４の処理に移る。 Next, eNB20 compares ValueTag notified from UE10 with ValueTag set to the alerting | reporting information change log | history table (refer FIG. 7) by the control part 23 in step S12. Here, since the comparison results match, the process proceeds to step S14.

次に、ｅＮＢ２０は、ステップＳ１４において、制御部２３により、一致したＶａｌｕｅＴａｇと対応付けられて報知情報変更履歴テーブル（図７参照）に設定されている呼確立の実施／未実施の情報を基に、ＵＥ１０と呼確立を実施するか判定する。ここでは、呼確立を実施すると判定したとし、ステップＳ１５の処理に移る。 Next, in step S14, the eNB 20 is based on the call establishment execution / non-execution information set in the broadcast information change history table (see FIG. 7) in association with the matched ValueTag by the control unit 23 in Step S14. , Whether to establish call establishment with the UE 10 is determined. Here, it is determined that call establishment is to be performed, and the process proceeds to step S15.

次に、ｅＮＢ２０は、ステップＳ１５において、ＲＲＣレイヤー２１により、ステップＳ１２の処理で一致したＶａｌｕｅＴａｇの値で送信していた過去の報知情報と無線上に現在送信中の報知情報との差分のパラメータと、無線上に現在送信中の報知情報のＶａｌｕｅＴａｇの値と、をＲＲＣＣｏｎｎｅｃｔｉｏｎＳｅｔｕｐメッセージに設定し、ステップＣ１４において、送信部（Ｕｕ）１２Ａにより、そのＲＲＣＣｏｎｎｅｃｔｉｏｎＳｅｔｕｐメッセージをＵＥ１０へ送信する。 Next, in step S15, the eNB 20 uses the RRC layer 21 to set a parameter for a difference between the previous broadcast information that has been transmitted with the same ValueTag value in the process of step S12 and the broadcast information currently being transmitted on the radio. Then, the value of ValueTag of the broadcast information currently being transmitted on the radio is set in the RRC Connection Setup message, and in Step C14, the transmission unit (Uu) 12A transmits the RRC Connection Setup message to UE10.

その後、ＵＥ１０は、ステップＣ１５において、制御部１３により、ＵＥ１０内部の報知情報の差分のパラメータとＶａｌｕｅＴａｇの値とを更新した上で、送信部（Ｕｕ）１２Ａにより、ＲＲＣＣｏｎｎｅｃｔｉｏｎＳｅｔｕｐＣｏｍｐｌｅｔｅメッセージをｅＮＢ２０に送信する。これにより、呼確立が完了となる。 Thereafter, in step C15, the UE 10 updates the difference parameter of the broadcast information in the UE 10 and the value of the ValueTag by the control unit 13, and then transmits an RRC Connection Setup Complete message to the eNB 20 by the transmission unit (Uu) 12A. Send. Thereby, call establishment is completed.

（第４の例）
図１１に、本例におけるＲＲＣＣｏｎｎｅｃｔｉｏｎ確立シーケンスを示す。(Fourth example)
FIG. 11 shows an RRC connection establishment sequence in this example.

本例は、ＵＥ１０が、無線上に現在送信中の報知情報を保持していない状態において呼確立を実施する手順とし、かつ、呼確立の実施を中止し、ＵＥ１０が現在保持している報知情報を無線上に現在送信中の報知情報へ更新し、再度呼確立を実施するかＵＥ１０に判定させる手順とする。 This example is a procedure for performing call establishment in a state where the UE 10 does not hold the broadcast information currently being transmitted on the radio, and the call information is stopped and the broadcast information currently held by the UE 10 Is updated to the broadcast information currently being transmitted on the radio, and the UE 10 determines whether to establish the call again.

まず、ステップＤ１１，Ｄ１２において、ＵＥ１０とｅＮＢ２０との間で、図４のステップＦ１１，Ｆ１２と同様のＲＡＣＨ手順を実施する。 First, in steps D11 and D12, the same RACH procedure as in steps F11 and F12 of FIG. 4 is performed between the UE 10 and the eNB 20.

次に、ＵＥ１０は、ステップＤ１３において、ＲＲＣレイヤー１１により、ＵＥ１０内部で保持しているＶａｌｕｅＴａｇをＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｑｕｅｓｔメッセージへ設定し、送信部（Ｕｕ）１２Ａにより、そのＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｑｕｅｓｔメッセージをｅＮＢ２０へ送信する。 Next, in Step D13, the UE 10 sets the ValueTag held in the UE 10 to the RRC Connection Request message by the RRC layer 11, and transmits the RRC Connection Request message to the eNB 20 by the transmission unit (Uu) 12A. .

次に、ｅＮＢ２０は、ステップＳ１４において、制御部２３により、一致したＶａｌｕｅＴａｇと対応付けられて報知情報変更履歴テーブル（図７参照）に設定されている呼確立の実施／未実施の情報を基に、ＵＥ１０と呼確立を実施するか判定する。ここでは、呼確立を実施しないと判定したとし、ステップＳ１６の処理に移る。 Next, in step S14, the eNB 20 is based on the call establishment execution / non-execution information set in the broadcast information change history table (see FIG. 7) in association with the matched ValueTag by the control unit 23 in Step S14. , Whether to establish call establishment with the UE 10 is determined. Here, it is determined that call establishment is not performed, and the process proceeds to step S16.

次に、ｅＮＢ２０は、ステップＳ１６において、ＲＲＣレイヤー２１により、ステップＳ１２の処理で一致したＶａｌｕｅＴａｇの値で送信していた過去の報知情報と無線上に現在送信中の報知情報との差分のパラメータと、無線上に現在送信中の報知情報のＶａｌｕｅＴａｇの値と、をＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｊｅｃｔメッセージに設定し、ステップＤ１４において、送信部（Ｕｕ）１２Ａにより、そのＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｊｅｃｔメッセージをＵＥ１０へ送信する。 Next, in step S16, the eNB 20 uses the RRC layer 21 to set a difference parameter between the previous broadcast information that was transmitted with the value of the value Tag matched in the process of step S12 and the broadcast information that is currently being transmitted on the radio. Then, the value of the ValueTag of the broadcast information currently being transmitted on the radio is set in the RRC Connection Reject message, and in Step D14, the RRC Connection Reject message is transmitted to the UE 10 by the transmitting unit (Uu) 12A.

その後、ＵＥ１０は、ステップＤ１５において、制御部１３により、ＵＥ１０内部の報知情報の差分のパラメータとＶａｌｕｅＴａｇの値とを更新した上で、更新した報知情報を基に、呼確立要求（ＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｑｕｅｓｔメッセージ）を再度送信するか判定する。呼確立要求の送信の判定は、報知情報に含まれる規制情報を基に実施する。例えば、規制情報にｅＮＢ２０へのアクセスが禁止されている情報が設定されている場合、ＵＥ１０は呼確立要求を送信しない。 Thereafter, in step D15, the UE 10 updates the difference parameter of the broadcast information in the UE 10 and the value of the ValueTag by the control unit 13, and then, based on the updated broadcast information, the call establishment request (RRC Connection Request message). ) Is transmitted again. The determination of transmission of the call establishment request is performed based on the restriction information included in the broadcast information. For example, when information that prohibits access to the eNB 20 is set in the restriction information, the UE 10 does not transmit a call establishment request.

図１２に、図８〜図１１において、ＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｑｕｅｓｔメッセージの受信時のｅＮＢ２０の処理のシーケンス全体を示す。 FIG. 12 illustrates the entire processing sequence of the eNB 20 when receiving the RRC Connection Request message in FIGS. 8 to 11.

図１２中のステップＡ１４までの処理の流れは図８の第１の例、図１２中のステップＢ１４までの処理の流れは図９の第２の例、図１２中のステップＣ１４までの処理の流れは図１０の第３の例、図１２中のステップＤ１４までの処理の流れは第４の例にそれぞれ該当する。 The process flow up to step A14 in FIG. 12 is the first example in FIG. 8, the process flow up to step B14 in FIG. 12 is the second example in FIG. 9, and the process up to step C14 in FIG. The flow corresponds to the third example of FIG. 10, and the flow of processing up to step D14 in FIG. 12 corresponds to the fourth example.

上述したように本実施形態においては、ＵＥ１０は、所定の報知情報のＶａｌｕｅＴａｇをｅＮＢ２０に送信し、ｅＮＢ２０は、ＵＥ１０から送信されてきたＶａｌｕｅＴａｇと無線上に現在送信中の報知情報のＶａｌｕｅＴａｇとの比較結果に基づいて、現在送信中の報知情報を取得するための情報をＵＥ１０に送信する。 As described above, in the present embodiment, the UE 10 transmits a value tag of predetermined broadcast information to the eNB 20, and the eNB 20 compares the value tag transmitted from the UE 10 with the value tag of the broadcast information currently being transmitted on the radio. Based on the result, information for acquiring broadcast information currently being transmitted is transmitted to the UE 10.

よって、ＵＥ１０は、ｅＮＢ２０から送信されてきた情報を基に、現在送信中の報知情報を取得できるようになる。 Therefore, the UE 10 can acquire broadcast information currently being transmitted based on the information transmitted from the eNB 20.

そのため、ＵＥ１０が、過去の報知情報を保持し続け、過去の報知情報を基にｅＮＢ２０と呼の確立処理を実施することにより、呼を確立できなかったり、呼を確立できても過去の報知情報による呼の確立のために通信品質が劣化したりすることが回避される。 For this reason, the UE 10 continues to hold past broadcast information, and by performing call establishment processing with the eNB 20 based on the past broadcast information, even if the call cannot be established or the call can be established, the past broadcast information It is avoided that communication quality deteriorates due to establishment of a call by

より具体的には、本実施形態においては、ＵＥ１０は、ＵＥ１０内で保持している報知情報のＶａｌｕｅＴａｇを、ＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｑｕｅｓｔメッセージに設定してｅＮＢ２０に送信する。 More specifically, in the present embodiment, the UE 10 sets the ValueTag of the broadcast information held in the UE 10 in the RRC Connection Request message and transmits it to the eNB 20.

また、ｅＮＢ２０は、ＵＥ１０内で保持しているＶａｌｕｅＴａｇが、現在送信中の報知情報および過去の報知情報のＶａｌｕｅＴａｇのいずれにも一致しない場合は、現在送信中の報知情報を取得するための情報として、報知情報の再取得を要求する情報を、ＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｊｅｃｔメッセージに設定して送信する。 In addition, when the ValueTag held in the UE 10 does not match any of the broadcast information currently being transmitted and the value Tag of the previous broadcast information, the eNB 20 obtains the broadcast information currently being transmitted. The information requesting reacquisition of the broadcast information is set in the RRC Connection Reject message and transmitted.

このＵＥ１０は、現在送信中の報知情報にも、過去の報知情報にも一致しない報知情報を保持している。そのため、ｅＮＢ２０は、このようなＵＥ１０に対し、現在送信中の報知情報を再取得させることができる。 The UE 10 holds broadcast information that does not match the broadcast information currently being transmitted or the past broadcast information. Therefore, the eNB 20 can cause the UE 10 to re-acquire broadcast information currently being transmitted.

また、ｅＮＢ２０は、ＵＥ１０内で保持しているＶａｌｕｅＴａｇが、過去の報知情報のＶａｌｕｅＴａｇのいずれかと一致し、かつ、一致した過去の報知情報と現在送信中の報知情報との差分に規制情報が含まれない場合は、現在送信中の報知情報を取得するための情報として、報知情報の差分の情報および現在送信中の報知情報のＶａｌｕｅＴａｇを、ＲＲＣＣｏｎｎｅｃｔｉｏｎＳｅｔｕｐメッセージに設定して送信する。 In addition, the eNB 20 has a value tag held in the UE 10 that matches one of the value tags of the previous broadcast information, and the restriction information is included in the difference between the matched previous broadcast information and the currently transmitted broadcast information. If not, the information of the difference between the broadcast information and the value tag of the broadcast information currently being transmitted are set in the RRC Connection Setup message as information for acquiring the broadcast information currently being transmitted.

このＵＥ１０は、現在送信中の報知情報とは規制情報自体には差分がない過去の報知情報を保持しているため、ｅＮＢ２０がアクセスを禁止していないことを確認した上で、呼確立要求を送信している。よって、ｅＮＢ２０は、このようなＵＥ１０に対しては、呼確立をし、現在送信中の報知情報の差分の情報を通知することで、ＵＥ１０が現在送信中の報知情報を全て読む手間を省き、短時間で呼を確立できるようになる。 Since this UE 10 holds past broadcast information in which the restriction information itself is not different from the broadcast information currently being transmitted, after confirming that the eNB 20 does not prohibit access, the UE 10 issues a call establishment request. Sending. Therefore, the eNB 20 establishes a call for such a UE 10 and notifies the difference information of the currently transmitted broadcast information, thereby eliminating the trouble of reading all the broadcast information currently transmitted by the UE 10, A call can be established in a short time.

また、ｅＮＢ２０は、ＵＥ１０内で保持しているＶａｌｕｅＴａｇが、過去の報知情報のＶａｌｕｅＴａｇのいずれかと一致し、かつ、一致した過去の報知情報と現在送信中の報知情報との差分に規制情報が含まれる場合は、現在送信中の報知情報を取得するための情報として、報知情報の差分の情報および現在送信中の報知情報のＶａｌｕｅＴａｇを、ＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｊｅｃｔメッセージに設定して送信する。 In addition, the eNB 20 has a value tag held in the UE 10 that matches one of the value tags of the previous broadcast information, and the restriction information is included in the difference between the matched previous broadcast information and the currently transmitted broadcast information. In the case of being transmitted, the information of the difference between the broadcast information and the value tag of the broadcast information currently being transmitted are set in the RRC Connection Reject message as information for acquiring the broadcast information currently being transmitted.

このＵＥ１０は、現在送信中の報知情報とは規制情報に差分がある過去の報知情報を保持しているため、ｅＮＢ２０がアクセスを禁止している状態でも、呼確立要求を送信する場合がある。よって、ｅＮＢ２０は、アクセスを禁止している状態で呼確立要求を送信してきたＵＥ１０に対しては、呼確立を中止し、ｅＮＢ２０へのアクセスを禁止する規制情報を含む現在送信中の報知情報を通知することで、再度の呼確立の要求を送信させないことができる。 Since this UE 10 holds past broadcast information that has a difference in restriction information from broadcast information that is currently being transmitted, the UE 10 may transmit a call establishment request even when the eNB 20 prohibits access. Therefore, the eNB 20 cancels the call establishment for the UE 10 that has transmitted the call establishment request in a state where access is prohibited, and the broadcast information currently being transmitted including the restriction information prohibiting access to the eNB 20 is transmitted. By notifying, it is possible not to transmit a request for establishing a call again.

以上、実施形態を参照して本発明を説明したが、本発明は上記実施形態に限定されるものではない。本発明の構成や詳細には、本発明の範囲内で当業者が理解し得る様々な変更をすることができる。 The present invention has been described above with reference to the embodiments, but the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

例えば、本実施形態においては、まず、ＵＥ１０から通知されたＶａｌｕｅＴａｇと、無線上に現在送信中の報知情報のＶａｌｕｅＴａｇと、を比較した後、ＵＥ１０から通知されたＶａｌｕｅＴａｇと、以前に無線上に送信されていた過去の報知情報のＶａｌｕｅＴａｇと、を比較している。すなわち２ステップで比較している。これに代えて例えば、ＵＥ１０から通知されたＶａｌｕｅＴａｇと、無線上に現在送信中の報知情報及び過去送信された報知情報のＶａｌｕｅＴａｇと、を一度に比較する、すなわち１ステップで比較するよう構成してもよい。 For example, in the present embodiment, first, the ValueTag notified from the UE 10 is compared with the ValueTag of the broadcast information currently being transmitted on the radio, and then the ValueTag notified from the UE 10 is transmitted over the radio before. The value tag of past notification information that has been used is compared. That is, the comparison is performed in two steps. Instead of this, for example, the ValueTag notified from the UE 10 is compared with the currently transmitted information information on the radio and the ValueTag of the previously transmitted information information at one time, that is, in one step. Also good.

また、本実施形態においては、本発明をＵＴＲＡＮＬＴＥに適用した場合を例に挙げて説明したが、本発明はこれに限定されず、ＷＣＤＭＡ（Wideband Code Division Multiple Access）にも適用することができる。 In the present embodiment, the case where the present invention is applied to UTRAN LTE has been described as an example. However, the present invention is not limited to this, and can be applied to WCDMA (Wideband Code Division Multiple Access). .

ただし、ＷＣＤＭＡに適用する場合には、無線通信システムの構成を、図１のＵＴＲＡＮを適用した構成とする必要がある。さらに、ＵＥ１０が、ｃｅｌｌｖａｌｕｅｔａｇとＰＬＭＮｖａｌｕｅｔａｇという２つのＶａｌｕｅＴａｇを、ＲＲＣＣｏｎｎｅｃｔｉｏｎＲｅｑｕｅｓｔメッセージに設定し送信する処理と、ＲＮＣ８０が２つのＶａｌｕｅＴａｇのそれぞれについて現在送信中の報知情報のＶａｌｕｅＴａｇと比較し、その比較結果をＮｏｄｅＢ９０に通知する処理と、を追加で行う必要がある。 However, when applied to WCDMA, the configuration of the wireless communication system needs to be a configuration to which the UTRAN in FIG. 1 is applied. Furthermore, the UE 10 sets and transmits two ValueTags, the cell value tag and the PLMN value tag, in the RRC Connection Request message, and the RNC 80 compares the value tag of the broadcast information currently being transmitted for each of the two ValueTags. The process of notifying the comparison result to the NodeB 90 needs to be additionally performed.

また、本発明の無線基地局および移動端末にて行われる方法は、コンピュータに実行させるためのプログラムに適用してもよい。また、そのプログラムを記憶媒体に格納することも可能であり、ネットワークを介して外部に提供することも可能である。 Further, the method performed in the radio base station and the mobile terminal of the present invention may be applied to a program for causing a computer to execute. In addition, the program can be stored in a storage medium and can be provided to the outside via a network.

本出願は、２００８年１２月１０日に出願された日本出願特願２００８−３１４７４８を基礎とする優先権を主張し、その開示の全てをここに取り込む。 This application claims the priority on the basis of Japanese application Japanese Patent Application No. 2008-314748 for which it applied on December 10, 2008, and takes in those the indications of all here.

Claims

A radio communication system comprising: a mobile terminal; and a radio base station that transmits broadcast information used to establish a call between the mobile terminal and the mobile station to the mobile terminal,
The mobile terminal
Transmitting identification information for identifying predetermined broadcast information to the radio base station;
The radio base station is
The identification information transmitted from the mobile terminal is compared with the identification information of broadcast information currently being transmitted, and information for acquiring broadcast information currently being transmitted is transmitted to the mobile terminal based on the comparison result. Wireless communication system.

The wireless communication system according to claim 1, wherein
The mobile terminal
A wireless communication system that sets identification information of broadcast information held by the terminal as the predetermined broadcast information in a message requesting call establishment, and transmits the message to the wireless base station.

The wireless communication system according to claim 2,
The radio base station is
As a result of the comparison, if the identification information transmitted from the mobile terminal matches the identification information of the broadcast information currently being transmitted, a wireless communication system that transmits a message for establishing a call to the mobile terminal.

The wireless communication system according to claim 2 or 3,
The radio base station is
Save the identification information of at least one previous broadcast information that was previously transmitted,
As a result of the comparison, when the identification information transmitted from the mobile terminal does not match the identification information of the broadcast information currently being transmitted, the identification information transmitted from the mobile terminal and the identification information of past broadcast information Compare wireless communication systems.

The wireless communication system according to claim 4, wherein
The radio base station is
As a result of the comparison, when the identification information transmitted from the mobile terminal does not match any of the identification information of the past broadcast information, the broadcast information is re-transmitted as information for acquiring the broadcast information currently being transmitted. A wireless communication system in which information requesting acquisition is set in a message rejecting call establishment and the message is transmitted to the mobile terminal.

The wireless communication system according to claim 5, wherein
The mobile terminal
After acquiring the broadcast information currently being transmitted, the identification information of the broadcast information held by the terminal is updated to the identification information of the broadcast information currently being transmitted,
A wireless communication system that sets updated identification information in a message requesting call establishment and transmits the message to the wireless base station.

The wireless communication system according to any one of claims 4 to 6,
The radio base station is
As a result of the comparison, if the identification information transmitted from the mobile terminal matches any of the identification information of past broadcast information, the difference between the previous broadcast information with the matched identification information and the broadcast information currently being transmitted A wireless communication system for determining whether or not the information includes restriction information regarding restriction of access to the local station.

The wireless communication system according to claim 7,
The radio base station is
As a result of the determination, when the restriction information is not included in the difference of the broadcast information, the information of the difference of the broadcast information and the identification information of the broadcast information currently being transmitted are used as information for acquiring the broadcast information currently being transmitted. A wireless communication system that sets a message for establishing a call and transmits the message to the mobile terminal.

The wireless communication system according to claim 7 or 8,
The radio base station is
As a result of the determination, when the restriction information is included in the difference of the broadcast information, the information of the difference of the broadcast information and the identification information of the broadcast information currently being transmitted are obtained as information for acquiring the broadcast information currently being transmitted. A wireless communication system that sets a message for rejecting call establishment and transmits the message to the mobile terminal.

In the radio | wireless communications system of any one of Claim 1 to 9,
The wireless communication system, wherein the identification information is a System Information Value Tag.

A radio base station that transmits broadcast information used to establish a call between the mobile terminal and the mobile station to the mobile terminal,
A receiving unit that receives identification information for identifying predetermined broadcast information from the mobile terminal;
A control unit that compares the identification information received from the mobile terminal with the identification information of the broadcast information currently being transmitted;
A radio base station comprising: a transmitter that transmits broadcast information to the mobile terminal and transmits information for acquiring broadcast information currently being transmitted to the mobile terminal based on the comparison result.

The radio base station according to claim 11,
The receiver is
A radio base station that receives a message requesting call establishment in which identification information of broadcast information held in the mobile terminal is set as the predetermined broadcast information from the mobile terminal.

The radio base station according to claim 12,
As a result of the comparison, when the identification information received from the mobile terminal matches the identification information of the broadcast information currently being transmitted, the processing unit further generates a message for establishing a call,
The transmitter is
A radio base station that transmits a message for establishing the call to the mobile terminal.

The radio base station according to claim 13,
The controller is
Save the identification information of at least one previous broadcast information that was previously transmitted,
As a result of the comparison, if the identification information received from the mobile terminal does not match the identification information of the currently transmitted broadcast information, the identification information received from the mobile terminal is compared with the identification information of past broadcast information. base station.

The radio base station according to claim 14,
The processor is
As a result of the comparison, when the identification information received from the mobile terminal does not match any identification information of past broadcast information, re-acquisition of broadcast information is performed as information for acquiring broadcast information currently being transmitted. Generate a message that sets the requested information and rejects call establishment,
The transmitter is
A radio base station that transmits information for rejecting call establishment, which sets information for requesting reacquisition of broadcast information, to the mobile terminal.

The radio base station according to claim 14 or 15,
The controller is
As a result of the comparison, when the identification information received from the mobile terminal matches any of the identification information of the past broadcast information, the difference between the past broadcast information that the identification information matches and the broadcast information that is currently being transmitted, A radio base station that determines whether or not the restriction information regarding the restriction of access to the own station is included.

The radio base station according to claim 16,
The processor is
As a result of the determination, when the restriction information is not included in the difference of the broadcast information, the information of the difference of the broadcast information and the identification information of the broadcast information currently being transmitted are used as information for acquiring the broadcast information currently being transmitted. Generate a message to set up the call,
The transmitter is
A radio base station that transmits a message for establishing a call, in which information of difference of broadcast information and identification information of broadcast information currently being transmitted are set, to the mobile terminal.

The radio base station according to claim 16 or 17,
The processor is
As a result of the determination, when the restriction information is included in the difference of the broadcast information, the difference information of the broadcast information and the identification information of the broadcast information currently being transmitted are set as information for acquiring the broadcast information currently being transmitted. Generated a message rejecting call establishment,
The transmitter is
A radio base station that transmits a message for rejecting call establishment, in which difference information of broadcast information and identification information of broadcast information currently being transmitted are set, to the mobile terminal.

The radio base station according to any one of claims 11 to 18,
The identification information is a radio base station which is a System Information Value Tag.

A mobile terminal that receives broadcast information used to establish a call between the radio base station and the own terminal from a radio base station,
A transmission unit for transmitting identification information for identifying predetermined broadcast information to the radio base station;
When the broadcast information is received from the radio base station and the identification information transmitted to the radio base station does not match the identification information of the broadcast information currently being transmitted, the broadcast information currently being transmitted is sent from the radio base station. A mobile terminal comprising: a receiving unit that receives information for acquisition.

The mobile terminal according to claim 20,
A processing unit for generating a message for requesting call establishment, in which identification information of broadcast information held by the terminal is set as the predetermined broadcast information;
The transmitter is
A mobile terminal that transmits a message requesting call establishment, in which identification information of broadcast information held by the terminal is set, to the radio base station.

The mobile terminal according to claim 21, wherein
The receiver is
A mobile terminal that receives a message for establishing a call from the radio base station when the identification information transmitted to the radio base station matches the identification information of broadcast information currently being transmitted.

The mobile terminal according to claim 21 or 22,
The receiver is
When the identification information transmitted to the radio base station does not match the identification information of the currently transmitted information and the past broadcast information, the broadcast base station transmits information as information for acquiring the currently transmitted broadcast information. A mobile terminal that receives a message for rejecting call establishment in which information for requesting reacquisition of information is set.

The mobile terminal according to claim 23, wherein
After obtaining the broadcast information currently being transmitted, the control unit further updates the identification information of the broadcast information held in the terminal to the identification information of the broadcast information currently being transmitted,
The processor is
Generate a message requesting call establishment with the updated identification information set,
The transmitter is
A mobile terminal that transmits a message requesting call establishment, in which updated identification information is set, to the radio base station.

The mobile terminal according to any one of claims 21 to 24,
The receiver is
The identification information transmitted to the radio base station does not match the identification information of the currently transmitted broadcast information, but matches the identification information of the previous broadcast information, and the past broadcast information matches the identification information When the difference from the currently transmitted broadcast information does not include the restriction information regarding the restriction on access to the radio base station, the broadcast information is broadcasted as information for acquiring the broadcast information currently being transmitted from the radio base station. A mobile terminal that receives a message for establishing a call, in which information of information difference and identification information of broadcast information currently being transmitted are set.

The mobile terminal according to any one of claims 21 to 25,
The receiver is
The identification information transmitted to the radio base station does not match the identification information of the currently transmitted broadcast information, but matches the identification information of the previous broadcast information, and the past broadcast information matches the identification information When the difference from the currently transmitted broadcast information includes restriction information related to the restriction on access to the radio base station, the information on the difference between the broadcast information and the current information as information for acquiring the currently transmitted broadcast information A mobile terminal that receives a message rejecting call establishment in which identification information of broadcast information being transmitted is set.

The mobile terminal according to any one of claims 20 to 26,
The identification information is a mobile terminal which is a System Information Value Tag.

A radio communication method using a radio communication system comprising: a mobile terminal; and a radio base station that transmits broadcast information used for establishing a call between the mobile terminal and the mobile station to the mobile terminal. ,
The mobile terminal transmitting identification information for identifying predetermined broadcast information to the radio base station;
The radio base station comparing the identification information transmitted from the mobile terminal with the identification information of the broadcast information currently being transmitted;
A radio communication method comprising: a step of transmitting, to the mobile terminal, information for acquiring broadcast information currently being transmitted based on the result of the comparison.

A radio communication method by a radio base station that transmits broadcast information used for establishing a call between the mobile terminal and the mobile station to a mobile terminal,
Receiving identification information for identifying predetermined broadcast information from the mobile terminal;
Comparing the identification information received from the mobile terminal with the identification information of the broadcast information currently being transmitted;
Transmitting to the mobile terminal information for acquiring broadcast information currently being transmitted based on the result of the comparison.

A radio communication method by a mobile terminal that receives broadcast information used to establish a call between the radio base station and the terminal from the radio base station,
Transmitting identification information for identifying predetermined broadcast information to the radio base station;
Receiving the information for acquiring broadcast information currently being transmitted from the radio base station when the identification information transmitted to the radio base station does not match the identification information of the broadcast information currently being transmitted; A wireless communication method.

A radio base station that transmits broadcast information used to establish a call between the mobile terminal and the mobile station to the mobile terminal,
Receiving identification information for identifying predetermined broadcast information from the mobile terminal;
A procedure for comparing the identification information received from the mobile terminal with the identification information of the broadcast information currently being transmitted;
A program for executing, on the basis of the result of the comparison, a procedure for transmitting information for acquiring broadcast information currently being transmitted to the mobile terminal.

From a radio base station to a mobile terminal that receives broadcast information used to establish a call between the radio base station and the own terminal,
A procedure for transmitting identification information for identifying predetermined broadcast information to the radio base station;
When the identification information transmitted to the radio base station does not match the identification information of the currently transmitted broadcast information, a procedure for receiving information for acquiring the broadcast information currently transmitted from the radio base station. The program to be executed.